STANDARDPhysics-Wave Optics
STANDARD Physics Young's Double Slit Experiment MCQ Question
Type: MCQ-conceptual-Medium-Class 12
In a double slit experiment, the distance between slits is increased ten times whereas their distance from screen is halved then the fringe width is
A
becomes 1/20
B
becomes 1/90
C
it remains same
D
becomes 1/10
Correct Answer
Option A
Detailed Explanation
Fringe width, β = (Dλ)/d. If d is increased by 10 times and D is halved, β becomes (1/10) × (1/2) = 1/20 of the original value.
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